common
Class HashMapDiff

java.lang.Object
  java.util.AbstractMap
      common.HashMapDiff

All Implemented Interfaces:

MapDiff, java.lang.Cloneable, java.util.Map

public class HashMapDiff
extends java.util.AbstractMap
implements MapDiff, java.lang.Cloneable

MapDiff implementation that uses a HashMap to store the values for changed keys, and a HashSet to store the removed keys. This implementation does not support null values.

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

HashMapDiff(java.util.Map underlying)
Creates a new HashMapDiff with the given underlying map.

Method Summary

void	changeUnderlying() Changes the underlying map so it is equal to this map.
void	clearChanges() Resets this map so it is equal to the underlying map.
java.lang.Object	clone()
boolean	containsKey(java.lang.Object key)
java.util.Set	entrySet()
java.lang.Object	get(java.lang.Object key)
java.util.Set	getChangedKeys() Returns the set of keys that map to different values in this map than in the underlying map.
java.lang.Object	put(java.lang.Object key, java.lang.Object value)
java.lang.Object	remove(java.lang.Object key)
int	size()

Methods inherited from class java.util.AbstractMap

clear, containsValue, equals, hashCode, isEmpty, keySet, putAll, toString, values

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

clear, containsValue, equals, hashCode, isEmpty, keySet, putAll, values

Constructor Detail

HashMapDiff

public HashMapDiff(java.util.Map underlying)

Creates a new HashMapDiff with the given underlying map.

Method Detail

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map

Overrides:

containsKey in class java.util.AbstractMap

get

public java.lang.Object get(java.lang.Object key)

Specified by:

get in interface java.util.Map

Overrides:

get in class java.util.AbstractMap

size

public int size()

Specified by:

size in interface java.util.Map

Overrides:

size in class java.util.AbstractMap

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

Specified by:

put in interface java.util.Map

Overrides:

put in class java.util.AbstractMap

remove

public java.lang.Object remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map

Overrides:

remove in class java.util.AbstractMap

entrySet

public java.util.Set entrySet()

Specified by:

entrySet in interface java.util.Map

Specified by:

entrySet in class java.util.AbstractMap

getChangedKeys

public java.util.Set getChangedKeys()

Description copied from interface: MapDiff

Returns the set of keys that map to different values in this map than in the underlying map. This includes any keys that have values in this map but not the underlying map, or vice versa.

The returned set may or may not be kept up to date as changes are made to this MapDiff.

Specified by:

getChangedKeys in interface MapDiff

Returns:

unmodifiable Set of Object

changeUnderlying

public void changeUnderlying()

Description copied from interface: MapDiff

Changes the underlying map so it is equal to this map.

Specified by:

changeUnderlying in interface MapDiff

clearChanges

public void clearChanges()

Description copied from interface: MapDiff

Resets this map so it is equal to the underlying map.

Specified by:

clearChanges in interface MapDiff

clone

public java.lang.Object clone()

Overrides:

clone in class java.util.AbstractMap